Remove unused Data::Dumper from cmake exporter #6

Job	Run time
basic_clang	5m 22s
basic_gcc	5m 7s
check_docs	1m 6s
check_update	1m 10s
check-ansi	2m 34s
address_ub_sanitizer	10m 8s
enable_non-default_options	4m 9s
full_featured	5m 33s
fuzz_tests	2m 53s
memory_sanitizer	21m 32s
minimal	2m 35s
no-deprecated	4m 48s
non-caching	14m 46s
no-shared-macos (macos-13)	7m 13s
no-shared-ubuntu	3m 54s
no-shared-macos (macos-14)	3m 28s
self-hosted	0s
threads_sanitizer	5m 28s
external-test-cf-quiche	4m 3s
external-test-pyca (1.51.0, 3.9)	8m 13s
external-tests	10m 25s
legacy	3m 57s
no-legacy	5m 1s
out-of-readonly-source-and-install-macos (macos-13)	12m 36s
out-of-readonly-source-and-install-ubuntu	6m 58s
out-of-readonly-source-and-install-macos (macos-14)	5m 31s
	2h 38m 30s

Provide feedback